A number of rookies played an important role to their team's success last season. The Rookie of the Year in each league helped snap streaks of losing seasons for each of their respective clubs and a plethora of other prospects made their impacts in 2015.
So perhaps it has never been more essential to keep an eye on the top prospects as Spring Training opens. Below are some of the top young players to keep tabs on in 2016. Click on the team name to read Part III of each club's Spring Training preview: Prospects to Watch.
American League
ANGELS
C Taylor Ward, LHP Nate Smith, OF Todd Cunningham, RHP Victor Alcantara, LHP Greg Mahle
ASTROS
SS Alex Bregman, RHP Michael Feliz, IF/OF Tony Kemp, 3B Colin Moran, RHP Joe Musgrove, 1b A.J. Reed, IF Tyler White
ATHLETICS
LHP Sean Manaea, SS Franklin Barreto, 2B Joey Wendle, 1B/OF Matt Olson, 3B Matt Chapman, SS Chad Pinder
BLUE JAYS
OF Anthony Alford, C Max Pentecost, RHP Connor Greene, 1B Rowdy Tellez
INDIANS
RHP Shawn Armstrong, 1B Bobby Bradley, RHP Mike Clevinger, OF Clint Frazier, OF Tyler Naquin, RHP Adam Plutko, OF Brad Zimmer
MARINERS
RHP Tony Zych, OF Boog Powell, SS Tyler Smith, RHP Jonathan Aro, LHP Paul Fry, OF Dario Pizzano, LHP Danny Hultzen
ORIOLES
RHP Dylan Bundy, RHP Hunter Harvey, 1B Christian Walker, RHP Mychal Givens, RHP Tyler Wilson, RHP, Mike Wright
RANGERS
3B Joey Gallo, OF Lewis Brinson, OF Nomar Mazara, OF Patrick Kivlehan, LHP Andrew Faulkner, RHP Myles Jaye
RAYS
LHP Blake Snell, 3B/1B/OF Richie Shaffer, OF Mikie Mahtook, C Justin O'Connor, SS Daniel Robertson, RHP Taylor Guerrieri, 2B Ryan Brett
RED SOX
LHP Brian Johnson, RHP Pat Light, SS Deven Marrero, LHP Henry Owens, RHP Noe Ramirez, 1B Sam Travis
ROYALS
SS Raul Mondesi, RHP Kyle Zimmer, RHP Miguel Almonte, OF Bubba Starling
TIGERS
RHP Michael Fulmer, RHP Joe Jimenez, SS Dixon Machado, OF Steven Moya, INF JaCoby Jones, RHP Drew VerHagen, LHP Kevin Ziomek
TWINS
CF Byron Buxton, RHP Jose Berrios, OF Max Kepler, LHP Tyler Jay, SS Nick Gordon, INF Jorge Polanco
WHITE SOX
RHP Carson Fulmer, SS Tim Anderson, RHP Spencer Adams, OF Adam Engel, OF Jacob May, RHP Tyler Danish, 3B Trey Michalczewski, OF Courtney Hawkins, 1B Corey Zangari, LHP Jace Fry, OF Micker Adolfo
YANKEES
OF Aaron Judge, RHP James Kaprielian, LHP Jacob Lindgren, SS Jorge Mateo, RHP Bryan Mitchell, 2B Rob Refsnyder, C Gary Sanchez
National League 
BRAVES
SS Dansby Swanson, LHP Sean Newcomb, SS Ozhaino Albies, RHP Aaron Blair, OF Mallex Smith, RHP Tyrell Jenkins, LHP Manny Banuelos, RHP Lucas Sims, RHP Chris Ellis, 3B Rio Ruiz, OF Braxton Davidson
BREWERS
SS Orlando Arcia, RHP Jorge Lopez, RHP Zach Davies, OF Rymer Liriano, 3B Garin Cecchini, INF Yadiel Rivera, OF Brett Phillips, LHP Josh Hader, C Jacob Nottingham, SS Isan Diaz, 2B Javier Betancourt
CARDINALS
LHP Marco Gonzales, OF Charlie Tilson, RHP Luke Weaver, SS Aledmys Diaz, C Carson Kelly
CUBS
RHP Carl Edwards Jr., OF Albert Almora, 3B Jeimer Candelario, RHP Duane Underwood, RHP Pierce Johnson, C Willson Contreras
D-BACKS
RHP Archie Bradley, RHP Braden Shipley, OF Socrates Brito, INF Brandon Drury, RHP Yoan Lopez, C Peter O'Brien, RHP Tyler Wagner, RHP Jake Barrett, RHP Enrique Burgos
DODGERS
SS Corey Seager, LHP Julio Urias, RHP Jose De Leon, INF Micah Johnson, C Austin Barnes, OF Trayce Thompson, RHP Ross Stripling, RHP Jharel Cotton, RHP Frankie Montas
GIANTS
INF Christian Arroyo, RHP Ray Black, RHP Clayton Blackburn, OF Jarrett Parker, OF Mac Williamson
MARLINS
LHP Jarlin Garcia, RHP Kendrys Flores, C Tomas Telis, RHP Nick Wittgren, INF J.T. Riddle, RHP Austin Brice, RHP Brian Ellington, RHP Nefi Ogando
METS
LHP Steven Matz, OF Brandon Nimmo, SS Gavin Cecchini, 1B Dominic Smith, SS Matt Reynolds
NATIONALS
RHP Lucas Giolito, SS Trea Turner, INF Wilmer Difo, LHP Nick Lee, OF Victor Robles, C Pedro Severino, INF Chris Bostick
PADRES
OF Manuel Margot, OF Hunter Renfroe, SS Javier Guerra, RHP Colin Rea
PHILLIES
RHP Mark Appel, RHP Jimmy Cordero, RHP Zach Eflin, RHP Jake Thompson, C Jorge Alfaro, C Andrew Knapp, SS J.P. Crawford, OF Roman Quinn, OF Nick Williams
PIRATES
RHP Tyler Glasnow, 1B Josh Bell, RHP Jameson Taillon, C Reese McGuire, C Elias Diaz, 2B Alen Hanson, LHP Steven Brault, RHP Chad Kuhl, RHP Trevor Williams, OF Willy Garcia, INF Max Moroff, OF Harold Ramirez
REDS
OF Jesse Winker, RHP Robert Stephenson, LHP Cody Reed, LHP Amir Garrett, 2B Jose Peraza, RHP Nick Travieso, OF Phillip Ervin
ROCKIES
INF Cristhian Adames, RHP Miguel Castro, OF David Dahl, RHP Jairo Diaz, RHP Carlos Estevez, LHP Kyle Freeland, RHP Jon Gray, RHP Jeff Hoffman, 3B Ryan McMahon, RHP German Marquez, LHP Sam Moll, C Tom Murphy, OF Jordan Patterson, RHP Antonio Senzatela, C Dom Nunez, SS Trevor Story, OF Raimel Tapia